package myFind;

import java.util.HashMap;
import java.util.Scanner;

public class HashMapTest {

    static boolean unique(String s)            //判断s中所有字母是否都唯一
    {
        HashMap<Character, Integer> map = new HashMap<Character, Integer>();
        for (int i = 0; i < s.length(); i++) {
            char c = s.charAt(i);
            if (map.containsKey(c))            //字母c不唯一返回false
                return false;
            else map.put(c, 1);
        }
        return true;                        //所有字母唯一返回true
    }

    public static void main(String[] args) {
        Scanner fin = new Scanner(System.in);
        String s;
        s = fin.next();
        if (unique(s)) System.out.println(s + ": Yes");
        else System.out.println(s + ": No");
    }
}
